If carefully, the experiment will be successful.
| A．do | B．does | C．done | D．doing |
Listening to loud music at rock concerts ______ caused hearing loss in some teenagers.
| A．is | B．are | C．has | D．have |
It is very ______ that she will ring me tonight.
| A．likely | B．possibly | C．probably | D．perhaps |
---Could you turn the TV down a little bit?
---______. Is it disturbing you?
| A．Take it easy. | B．I’m sorry. | C．Not a bit | D．It depends |
--I’m going to the States?
--How long ________ you________ in the States?
| A．are; stayed | B．are; staying | C．have; stayed | D．did; stay |
Rather than _________ on a crowded bus, he always prefers _________ a bicycle.
| A．ride; ride | B．riding; ride | C．ride; to ride | D．to ride; riding |