—You may find the key to the maths problem on page 107.
—Ah, it’s so simple. I wonder why I ＿of that.
| A．hadn’t thought | B．haven’t thought |
| C．didn’t think | D．wasn’t thinking |
When I miss my family, it’s ________ great comfort to have a ________ family to be with.
| A．a; substitute | B．a; replace | C．/; substitute | D．/; replace |
─They said that we would take a camping this weekend.
─________ it rains then?
| A．What if | B．What for | C．What about | D．How come |
Many people agree that __________ knowledge of English is a must in _____ international trade today.
| A．the, an | B．a, / | C．the, the | D．/, the |
It is a great concern that the school is now ____ for experienced teachers.
| A．badly in need | B．badly off | C．better off | D．struggling |
-- The cars give off a great deal of waste gas in the streets.
--- Yes. But I’m sure something will be done to ___ air pollution.
| A．reduce | B．remove | C．drop | D．warn |