---Where did you come across our chemistry teacher ?
--- It was in the supermarket ______I purchased mooncakes．
| A．that | B．which | C．where | D．When |
At home, he keeps some pets, to which he _____ all his spare time.
| A．spends | B．offers | C．devotes | D．provides |
------Don't put the waste on the ground.
------Oh, I'm very sorry. I ____ the dustbin there.
| A．don't see | B．isn't seeing | C．didn't see | D．haven't seen |
___ Mr Morgan appears extremely cheerful in public, he is in fact leading a very unhappy life.
| A．While | B．When | C．As | D．Since |
------I have just had my watch repaired.
------How much did they ____ for that?
| A．cost | B．charge | C．spend | D．pay |
Speaking of all the songs he has written, I think this is probably his ____ one.
| A．better-known | B．well-known | C．best-known | D．most-known |