A break of 10 minutes is necessary to relax the eyes after working continuously for 30 minutes to an hour, said Wei Wenbin, head of the ophthalmology department with Beijin...
22. My sister is good at sports, She can jump ___ than me. A. highest B. very high C. too high D. much higher 23.The Yellow River is one of ___ in China. A. the longest rivers B. the longer river C. the longest river D. the long river 24...
8. Plane is a machine that can fly. Plane为可数名词单数, 不能单独放在句中, 应在其前加冠词或把它变为复数, 而本句后有a machine, 因此只能在其前面加a, 变为A plane。 9. He played a piano at the party yesterday. 把a 改为the , ...
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