We were about to start out________ our friends called us up from Shanghai.
| A．when | B．while | C．until | D．before |
Whenever you are to walk on the ice , that it is solid and safe enough.
| A．examine | B．check | C．try | D．make |
—Did you have a good sleep last night ?
—Yes ,never sleep .
| A．badly | B．better | C．worse | D．best |
—Tom came to work last Friday ,but no one has seen him since.
— he have had an accident ?
| A．Should | B．Must | C．Might | D．Could |
—I’m entering for the 100—meter race.
— .
| A．Congratulations | B．Enjoy yourself |
| C．Good luck | D．Wonderful |
I don’t think Peter is too young to take care of the pet dog ________.
| A．properly | B．correctly | C．exactly | D．actively |