Whatever is left over may be put into the refrigerator, ______ it will keep for two or three weeks.
| A．when |
| B．which |
| C．where |
| D．while |
Parents need to teach their children how to behave______.
| A．in public | B．in company | C．in peace | D．in trouble |
Helen was fully occupied_____business matters, so we didn’t want to brother her.
| A．for | B．at | C．in | D．with |
-Sorry, do you mind if I smoke here?
-Yes,.
| A． |
you could |
B． |
go ahead |
C． |
I do |
D． |
my pleasure |
It's the first time that he has been to Australia,?
| A． |
isn't he |
B． |
hasn't he |
C． |
isn't it |
D． |
hasn't it |
Peter’s jacket looked just the same as Jack’s, but it cost _____ his.
| A．as much twice as | B．twice as much as |
C．much as twice as | D．as twice much as |