With sufficient scientific information a manned trip to Mars should be _____.
| A．obtainable | B．potential | C．considerable | D．feasible |
His remarks left me _ about his real purpose.
| A．wonder | B．wondering | C．to wonder | D．wondered |
The party was successful, but we thought it a pity not _ you.
| A．invite | B．to invite | C．inviting | D．to have invited |
_ his father had come, his face lit up.
| A．Having heard | B．When he heard | C．Hearing | D．When hearing |
With all the magazine he needed _ ,he left the library.
| A．borrowing | B．borrowed | C．borrow | D．to borrow |
Its this TV set which you wish _ ?
| A．to have it repaired | B．to repair | C．to have repaired | D．will be repaired |