Whenever you need help， just call me． I can come at the drop of a hat．（ ）
| A． |
with a hat |
B． |
without a hat |
| C． |
at once |
D． |
at a low speed |
﹣﹣﹣Could you please tell me _______ ？
﹣﹣﹣Of course.I suggest Water City Restaurant.（ ）
A．when can we get some food quickly
B．when we can get some food quickly
C．where can we get some food quickly
D．where we can get some food quickly
The documentary Aerial China《航拍中国》is wonderful.So far，I ______ it three times.（ ）
A．watchedB．will watch
C．have watchedD．watch
﹣﹣﹣Did you have a welcome party for Laura last night？
﹣﹣﹣No，we didn't.It was ______ because Laura was in hospital.（ ）
A．put offB．taken offC．cut offD．turned off
Yuan Longping is a great scientist ______ was honored as "The Father of Hybrid Rice".（ ）
A．whenB．whoC．whichD．whose
﹣﹣﹣I think it is a good way to study English by watching English movies.
﹣﹣﹣I agree.I find it _______ to improve my listening.（ ）
A．harmfulB．thankfulC．carefulD．helpful