—Is there a fog in the evening ?—There _____ be . I’ll make a phone call to find it out .

As a graducate in computer science, he ___ to work out the problem.

--- Mike, it’s a pity you didn’t come to last night’s concert. It was really great! --- Really? If I ________ so busy, I would have gone with you.

 As I explained on the phone, your request that the plan     at once will be    considered at the next meeting. 

Tom’s mother often requires that he       more time in studying English every day．