Fill in the blanks with the given verbs in their proper forms(用括号中所给动词的适当形式填空)

【1】He_______ (be) back in two weeks.

【2】Martin_______ (read) a book in the library at the moment.

【3】What can we do if there_______ (be) no rain?

【4】More and more foreigners are used to_______ (speak) Chinese.

【5】When he was on his way to the office, he_______ (see) an accident.