He was heard________ three songs in the next room.
| A．sing | B．to sing | C．singing | D．sung |
Why don’t you bring ____ to his attention that you are too busy to do it?
| A．that | B．what | C．it | D．which |
He began to take political science ________ only when he left school.
| A．strictly | B．seriously | C．carefully | D．truly |
People are talking about the new playin two weeks.
| A．to be put on | B．being put on |
| C．put on | D．puts on |
Old-fashioned phones matter when wireless networks __________ in disasters.
| A．break out | B．break up |
| C．break in | D．break down |
The streets are all dry. It _____ during the night.
| A．must have rained | B．should have rained |
| C．can’t have rained | D．couldn’t rain |