试题详情

We were having such a good time that we decided to ___________ our stay by another week.

our chickens started laying eggs, we had such a ______of eggs that we were giving many away to our

___________ homework did we have to do that we had no time to take a rest.

ent from another. Yet a very young child or even an animal, such as a pingeon can learm to recogniz

,000 odors. Reed says that a perfume expert can sniff a modem scent that has a hundred different odo