American students take part in a wide variety of after-school activities _______ they develop their social skills.
| A.where | B.which | C.that | D.what |
Why the explosion occurred was ____ the laboratory attendant had been careless.
| A.for | B.because | C.since | D.that |
________ one foot before the other, slowly and purposefully, the deer walked up to_______ I was _______.
| A.Put, where, seated |
| B.Putting, the place where, seating |
| C.Put, the place in which, sitting |
| D.Putting, the place where, sitting |
This field of scientific research remains________.
| A.to be untouching | B.being touched |
| C.to be untouched | D.untouched |
The teacher just took down the names of the students _______ during the exam.
| A.caught cheating | B.caught to cheat |
| C.catching cheating | D.to catch cheating |
______ to get a seat for the concert, he didn’t mind standing in a queue all night.
| A.Determine | B.To be determined |
| C.Determined | D.Being determined |