Almost every teenager will experience a period in their life _____ they aren’t content with their parents.
| A．when | B．where | C．that | D．which |
I feel so excited！At this time tomorrow morning I ________ to Shanghai.(2012·辽宁)
| A．will be flying | B．will fly |
| C．have been flying | D．have flown |
I have to see the doctor because I ________ a lot lately.
| A．have been coughing | B．had coughed |
| C．coughed | D．cough |
—Why，Jack，you look so tired!
—Well，I ________ the house and I must finish the work tomorrow.
| A．was painting | B．will be painting |
| C．have painted | D．have been painting |
Tom ________ in the library every night over the last three months.(2011·北京)
| A．works | B．worked |
| C．has been working | D．had been working |
In order to find the missing child，villagers ________ all they can over the past five hours.(2012·安徽)
| A．did | B．do |
| C．had done | D．have been doing |