题目内容
根据括号中所给的汉语写出单词，使句子意思完整正确。
My sister has ________(也)gone to the town．
It is hard ________ English well．
A．
learn
B．
to learn
C．
learning
D．
learns
用所给词的适当形式填空。
I ________ just ________(buy)a new MP4．
Betty has ________ cleaned her bedroom but she hasn't done her homework ________．
ever;yet
just;already
already;yet
just;just
No one ________ Mars yet．
has been to
have been to
went
goes
用所给单词的适当形式填空。
There are ________(billion)of stars in our galaxy．
下列各句中均有一处错误，请指出并改正。
I ________(learn)English for 3 years．
My uncle ________ my hometown for 3 years．
has left
has been away from
left
had left
