_______ the teacher’s instruction in the lab_____ important.
A.Following; are | B.Following; is | C.Followed by; are | D.To follow; are |
He is very_____; it is impossible to talk him into doing anything he doesn’t want to.
A.stubborn | B.curious |
C.skeptical | D.gracious |
It was only then ______ I began to have doubts about whether my story had ever been told.
A.when | B.Since |
C.that | D.yet |
The secretary worked late into the night, ______ a long speech for the president.
A.to prepare | B.prepared |
C.preparing | D.to be prepared |
There is no doubt _______ nearsightedness is a serious problem among the youth of our country.
A./ | B.which |
C.whether | D.that |
You needn’t have ________ the speaker when he was speaking; there was enough time afterwards for you to ask questions.
A.affected | B.interrupted |
C.involved | D.disturbed |