The contract says they offer a company six months' free ________if it signs a threeyear lease.
| A．employment | B．rent | C．pay | D．hire |
He is wet to the skin. He ____ in the rain.
| A．must have caught | B．must have been caught | C．must catch | D．must be caught |
. Enough attention should be paid to _____ your pronunciation and intonation.
| A．improve | B．improving | C．improved | D．be improve |
Our country is now short of natural gas oil and other forms of_______.
A energy B strength C power D material
Knowing the result of the exam, he went home and lay in bed, ______.
A upset B 
was upset C felt upset D and upset
——Oh,it’s you!I______you.
——I’ve just had my hair cut and I’m wearing new glasses.
| A．didn’t recognize | B．hadn’t recognized |
| C．haven’t recognized | D．don’t recongnize |