Grammar & Usage Mock Tests

86 questions available

Grammar & Usage Mock Test 1

Questions: 30

Grammar & Usage Mock Test 2

Questions: 30

Grammar & Usage Mock Test 3

Questions: 26

Sample Questions

TOEFL Writing

Choose the sentence that correctly uses a comma in a compound sentence.

A The first group received the treatment, but the second group received a placebo.

B The first group received the treatment but, the second group received a placebo.

C The first group received the treatment, but, the second group received a placebo.

D The first group received the treatment but the second group received a placebo,.

TOEFL Writing

Choose the option that correctly uses the word "affect" or "effect."

A The researchers hypothesized that the intervention would have a significant effect on participants' behavior.

B The researchers hypothesized that the intervention would significantly affect on participants' behavior.

C The researchers hypothesized that the intervention would have an significant affect on participants' behavior.

D The researchers hypothesized that the intervention would affect a significant effect on participants' behavior.

TOEFL Writing

Choose the best option to complete the sentence with the correct relative pronoun: "The variable ______ most strongly predicted the outcome was not the one the researchers originally hypothesized."

A which

B that

C whom

D whose

TOEFL Writing

Read the following sentence. Choose the option that best improves the sentence by replacing the underlined portion. "The teacher told the students that the experiment was very good and it showed they worked hard."

A NO CHANGE

B excellent and demonstrated their dedication

C superb and displayed their effort

D fine and indicated they put in work

TOEFL Writing

The sentence below is missing a word. Choose the best option. "By the time the report ______, all the participants had already been notified of the results."

A was finalized

B had been finalized

C would be finalized

D has been finalized

TOEFL Writing

Choose the option that best completes the sentence. "The professor advised that the research paper ______ before the deadline."

A be submitted

B is submitted

C will be submitted

D has been submitted

TOEFL Writing

Choose the sentence that correctly uses a semi-colon.

A The experiment failed to replicate; the original findings could not be reproduced.

B The experiment failed to replicate; because the original findings could not be reproduced.

C The experiment failed to replicate; the original findings could not reproduced.

D The experiment failed to replicate; to reproduce the original findings.

TOEFL Writing

Choose the best pronoun to fill in the blank. "Each of the three proposed models performed differently, and ______ accuracy varied depending on the dataset used."

A their

B its

C his

D her

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