The workers agreed to ________ the strike if the company would satisfy their demands.
| A．call for | B．call in | C．call off | D．call up |
The children are busy doing piles of homework, for they _______ their end-of-term exam soon.
| A．will be taken | B．take | C．are taking | D．would take |
When the powerful earthquake struck and all lights went out all of a sudden. It seemed _______ the world was at an end.
| A．as if | B．even if | C．such as | D．like that |
They told us it was the second time that the volunteers _______ the nursing home.
| A．visited | B．have visited | C．were visiting | D．had visited |
It keeps raining these days. We doubt _______ the sports meeting will take place as planned.
| A．which | B．that | C．whether | D．when |
President Obama won the 2012 election over Romney and is once more in__ of the White House.
| A．return | B．search | C．relief | D．power |