— When is he willing to lend his friends some money?
— Only when ______ hard enough.
| A．to press | B．pressed | C．pressing | D．is pressed |
Mr Bush is on time for everything. How＿＿＿it be that he was late for the opening ceremony?
| A．can | B．should | C．may | D．must |
Iyou a beautiful present for your birthday,but I was short of money at that time.
| A．would buy | B．had bought |
| C．would like to have bought | D．must have bought |
I lost your address, otherwise I＿＿＿＿you long before.
| A．had visited | B．have visited | C．would have visited | D．should visit |
Very loud noise＿＿＿＿＿make people ill or drive them mad.
| A．should | B．can | C．need | D．must |
＿＿＿＿＿he come, the problem would be settled.
| A．Would | B．Should | C．Shall | D．If |