The children are having fun ________ on the playground.
A.to play B.play C.playing D.played
We are supposed to ___________a solution to stop people from looking down at their mobile phones while driving cars.
A. come up with B. come from
C. come out D. come true
.I was supposed ___ at 7:00 ,but I arrived at 8:00.
A. arrive B. to arrive C. arrives D. arriving
This kind of skirt looks ___ and sells _____.
A. nice well B. nice; good C. well; well D. good nice
After Mandela was free (自由的) in 1990, he chose to shake hands with the people ________ wanted to kill him.
A. whose B. which C. / D. who
All the students the sad story and they all cried.
A. moved to B. moved by
C. were moved to D. were moved by