用所给动词的适当形式填空。My dream is_________(become) a great writer like MoYan.
The museum_________(build) eight years ago.
We _________ (learn) 3,000 English words by the end of last term.
He was last seen_________ (leave) his office in New Town at about 7.pm
Although shopping online is fast and easy, you’d better __________(not be) crazy about it.