---Were you busy last weekend?
---Very. Rather than __________ time playing cards as usual, I devoted every effort to________ an advertisement.
| A．wasting; making | B．waste; make | C．to waste; make | D．a waste of; making |
The approach _________ the problem is contrary ________ our expectations.
| A．of; to | B．to; to | C．to; on | D．for; on |
She is always thinking more of herself, seldom, ________, offering to help others.
| A．if never | B．if possible |
| C．if ever | D．if any |
---How often do you drop your e-pal a line?
---_______, but usually once a week.
| A．It depends | B．As usual |
| C．Generally speaking | D．Have no idea |
Our skin, if ______ to sunlight for a long time, can become darker.
| A．exposes | B．exposing |
| C．being exposed | D．exposed |
_______ he met with the difficulty did he realize the importance of our help.
| A．Never until | B．Even though |
| C．Until when | D．Ever since |