Ⅰ.用所给单词的适当形式填空
1．I don't know when ________(leave) Beijing.
2．Linda ________(type) three key words into the search engine and found the useful information about the topic.
3．With the teacher's help, the two boys ________(easy) found the answer to the question.
4．Let's set up a time ________(play) games together on Sunday.
5．Tommy, your advice was so ________(help) and I passed the exam successfully.
