— 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 |
The bag has lots of things in it, ______ an old dictionary.
| A．containing | B．showing | C．holding | D．including |
I was about to tell everyone the truth ______ she turned up.
| A．while | B．when | C．as | D．till |
Helen is on time for everything. How ______ it be that she was late for such an important interview?
A
. might B. can C. must D. may
While you are enjoying yourself in Beijing this time tomorrow, I ______ my mother do housework at home.
| A．am helping | B．will help | C．would help | D．will be helping |
The e-mail, as well as the telephone, ______ an important part in 
daily communication.
| A．is playing | B．have played | C．are playing | D．play |