Sorry to have kept you waiting so long，but it’ll still be some time____Mr．Smith is available．
| A．when | B．before | C．after | D．Since |
It is difficult, so I suggest that you __ it to an expert.
| A．should leave | B．will leave | C．are leaving | D．may leave |
Luckily, we’d brought a road map, _________ we would have lost our way.
| A．without it | B．with that | C．without which | D．without that |
The houses . They will be finished next year.
| A．are built | B．have been built | C．are being built | D．were built |
My throat is always by bad weather.
| A．affecting | B．effected | C．effect | D．affected |
It is ___________ that this matter hasn’t been paid attention to.
| A．attractive | B．obvious | C．cheerful | D．sensitive |