-I'm sad to hear that Yuan Longping passed away.
-So am I.We lost a hero.His _____________ on hybrid（杂交）rice helped Chinese people solve the problem of eating.
| A． |
surveys |
B． |
reports |
| C． |
researches |
D． |
achievements |
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
﹣﹣﹣Hello，Jenny.I can't find my math book _____.Did you see it？
﹣﹣﹣Sorry，I didn't.（ ）
A．everywhereB．anywhereC．somewhereD．nowhere