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
