Hi，Nora．Is your mother at home？
Just a minute! She ______ flowers in the garden．（ ）
A．plantB．is planting
C．plantedD．was planting
Could you help me repair the bike？
______． Come and get it in half an hour．（ ）
| A． |
Not at all |
| B． |
No problem |
| C． |
I'm sorry I can't |
______ they are twin brothers， ______ they don't look like each other．（ ）
| A． |
Although； / |
| B． |
Although； but |
| C． |
But； although |
Do you know whose book it is？
Oh． It ______ be Lucy's． Look， her name is on it．（ ）
| A． |
can't |
B． |
must |
C． |
shouldn't |
Her parents bought a new car for ______．（ ）
| A． |
themselves |
B． |
herself |
C． |
themselfes |
The computer is one of the most important ______．（ ）
| A． |
inventor |
B． |
inventions |
C． |
invention |