-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 |
相关试题
Today， with the Internet， people can communicate than ever before．（ ）
| A． |
easily |
B． |
more easily |
| C． |
most easily |
D． |
the most easily |
We on the playground when it began to rain．（ ）
| A． |
ran |
B． |
were running |
| C． |
run |
D． |
have run |
Look at the sig． You take photos here．（ ）
| A． |
couldn't |
B． |
needn't |
C． |
mustn't |
D． |
won't |
In China， we always use red paper for Hongbao red means luck．（ ）
| A． |
until |
B． |
if |
C． |
although |
D． |
because |
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