Scientists are working hard to make _______ possible for people to live on Mars in the future.
A. it B. that C. this D. one
----- Can you tell me _______?
----- He’s active and energetic.
A. what does he like B. what he likes
C. what he is like D. what is he like
---- Do you have difficulty _______ ready for the exam ?
----- No, I have made a decision _________ over lessons this weekend.
A. to get; to go B. getting; going
C. getting; to go D. to get; going
He devoted as much time as he could _______ on the plan.
A. working B. to work C. worked D. to working
I don’t know if it ____ tomorrow. If it _____, we will go out for a picnic.
A. will rain; won’t rain B. rains; doesn’t rain
C. rains; won’t rain D. will rain; doesn’t rain
Mark isn’t coming to the concert _____ he has finished his work.
A. so B. when C. although D. because
