His experiment done in ______ summer of 1970 was ______ failure.
A./; a | B./; / | C.the; a | D.the; / |
— How long do you think it will be _______ the USA recovers from the losses of the financial crisis?
— Perhaps four or five years.
A.when | B.since | C.that | D.before |
Listening attentively in class and reviewing in time _______ a sure way to improve your learning, and this is especially true _______ it comes to standard tests.
A.are; when | B.is; when | C.is; while | D.are; as |
Though the teacher had tried to make the problem easy _______, still Lily and her partner were at a loss.
A.understood | B.understanding | C.to understand | D.to be understood |
_______ difficult the task may be, we must finish it on time, because we can’t miss _______ a precious opportunity.
A.Whatever; so | B.However; such | C.However; so | D.Whatever, such |
— Bad luck. They didn’t offer the job to me.
—_______ You’ve been well prepared for the interview.
A.So what? | B.What if? | C.How come? | D.Guess what? |