I like getting up very early in summer. The morning air is so good .
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
My mobile phone is missing. Who _____ it?
| A．must have taken | B．should have taken |
| C．could have taken | D．need have taken |
The young man, _____ in heavy traffic on the way, got home an hour later than usual.
| A．catching | B．caught | C．having caught | D．to be caught |
Don’t run red lights, _____ you may get run over by a car.
| A．so | B．but | C．for | D．or |
Language is changing all the time. Some English words today can mean totally different things to _____ they meant before.
| A．which | B．that | C．不填 | D．what |
Give my regards to your parents when you _____ home.
| A．will call | B．call | C．have called | D．called |