He asked _______ Betty came home late last night．（ ）
| A． |
weather |
B． |
whether |
C． |
where |
The documentary A Plastic Ocean is so impressive that I ___________it several times so far.
A．watchedB．watch
C．have watchedD．will watch
The gravity on Mars is only about there eighths of ___________on the Earth.
A．thatB．thoseC．oneD．ones
Peter has ________ memory and often forgets the names of people round him.
A．longB．goodC．richD．poor
I know how busy you are and naturally I wouldn't take ________ too much of your time.
A．offB．upC．onD．down
According to the new traffic rules，people ___________ wear a helmet when riding an e﹣bike.
A．mightB．mayC．canD．must