The designer has tried every possible way to make the robot light， so you _____ worry about its weight．（ ）
A．mustB．mayC．can'tD．needn't
Many wild animals are_____，and it's time for us to do whatever we can to protect them．（ ）
| A． |
on duty |
B． |
on show |
C． |
in order |
D． |
in danger |
Mr．Black's memory is getting____．As a result，he often leaves his keys at home．（ ）
| A． |
older |
B． |
poorer |
C． |
greater |
D． |
better |
When the baby dog____，it was very hungry．So we gave it some food．（ ）
| A． |
is found |
B． |
was found |
| C． |
has been found |
D． |
will be found |
Helen has got two brothers．_____of them likes chocolate，but she loves it．（ ）
| A． |
Neither |
B． |
None |
C． |
Each |
D． |
Any |
Cathy has such a good_____that she won many prizes in singing competitions last year．（ ）
| A． |
sleep |
B． |
idea |
C． |
voice |
D． |
time |