Mrs. Smith finds it hard to clear up the mess, as her children are alwayswhenever she tries to.
| A． | in the way | B． | on watch | C． | in sight | D． | on the line |
is a good chance that I'I1 finish the work tomorrow.
| A．It | B．There | C．This | D．That |
Access the mountain-town is often difficult because of the bad roads.
| A．of | B．with | C．to | D．on |
Once out of the earth’s gravity, the astronaut is by the problem of weightlessness.
| A．affected | B．effected |
| C．related | D．offered |
The doctor telephoned to say that he couldn’t ____ the meeting because he had to ___ a patient.
| A．came to; attend to | B．attend; attend |
| C．join; treat | D．attend on; look after |
When we are in a new place, we must __our manners and try to follow the customs of the place.
| A．look out | B．keep eyes out | C．mind | D．put up with |