To feed her little son． Mrs． Smith has to _______ the vegetables and meat．（ ）
| A． |
make up |
B． |
put up |
C． |
set up |
D． |
cut up |
As far as I know， the robot that can sweep the floor ________ in the 1980s．（ ）
| A． |
is invented |
B． |
invented |
| C． |
was invented |
D． |
has invented |
The man _______ be a doctor in this hospital， but I'm not sure．（ ）
| A． |
must |
B． |
would |
C． |
can |
D． |
might |
Ling ling， you'll feel sleepy tomorrow _______ you go to bed early．
OK， Mom． I'll go to bed at once．（ ）
| A． |
if |
B． |
unless |
C． |
though |
D． |
because |
Frank is an honest boy and he never tells a lie． We all _______ him．（ ）
| A． |
miss |
B． |
mind |
C． |
doubt |
D． |
trust |