A Colorado woman said that her iPhone 4 ______ fire while charging overnight.
| A．had caught | B．has caught fire | C．was catching | D．caught |
It was decided to _____ the search when there was no hope of finding the missing girl alive.
| A．call off | B．take up | C．keep off | D．ring up |
The Prime Minister refused to comment on the rumor that he had planned to _____.
| A．discharge | B．dismiss | C．resign | D．resume |
Professor Jordon is well known for his _____ into the habits of the common housefly.
| A．examination | B．introduction |
| C．research | D．expression |
I support your decision, but I should also make it clear that I am not going to be _____ to it.
| A．connected | B．fastened | C．bound | D．stuck |
In spite of the thunderstorm, the children slept _____ all night.
| A．densely | B．soundly | C．loudly | D．noisily |