Today there are more airplanes ______ more people than ever before in the skies.
| A．carry | B．to be carrying |
| C．carried | D．carrying |
The beautiful sunset our attention，and we stopped to watch it.
| A．caught | B．paid | C．fixed | D．slipped |
We're still at the airport. If it weren’t for the delayed flight, we _____the concert right now.
| A．can be enjoying | B．must have enjoyed |
| C．would be enjoying | D．should have enjoyed |
It never occurred to humans until the mid-l990s some animals can be cloned.
| A．where | B．that | C．when | D．what |
—Will the match be cancelled because of the bad weather？
—No. Rain or shine，the match will be held as .
| A．schedule | B．scheduling | C．scheduled | D．to schedule |
Any help from you will be greatly appreciated. P1ease give me a reply at your earliest.
| A．interruption | B．instruction | C．consideration | D．convenience |