If you do not learn seriously, ______to understand the subject well

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

(A) After driving for twenty miles., he (B) suddenly realized that he (C) has been driving (D) in the wrong direction.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

They asked me (A)how long (B) did it take to (C) get to Paris (D) by train.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

She helped us a lot with our project. We couldn't continue without her.

It is high time we______ something to protect our environment

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

The weather was very hot. They continued playing football.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that Is closest in meaning to each of the following questions.

This film is interesting but the film we saw last week was more interesting.

The man______is very friendly.