Rewrite: “If he does not pay careful attention to lessons, he cannot keep pace with his classmates.”
A. Unless he pays careful attention to lessons, he cannot keep pace with his classmates.
B. Unless he pays careful attention to lessons, he can keep pace with his classmates.
C. Unless he does not pay careful attention to lessons, he cannot keep pace with his classmates
D. If he pays careful attention to lessons, he cannot keep pace with his classmates

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Grammar › ViewThe weather is not good today, ______________?
A. isn’t it?
B. doesn’t it?
C. won’t it?
D. will it?
Gerunds and Infinitives › View
Identify the word or phrase that needs correcting.
Yesterday, Minh didn’t want to coming to the theater with them because he had already seen the film.
A. didn’t
B. to coming
C. them
D. had already seen
Passive Modals in Different Tenses › ViewRewrite the sentence in passive voice in past simple tense: She could solve the problem.
A. She was solving the problem.
B. The problem was solved by her.
C. The problem could be solved by her.
D. The problem was solving by her.
Grammar › View
Let’s go away next weekend, _____ we?
A. will
B. shall
C. should
