---People often don’t appreciate what they have, do they? ---No, _______ they lose it.
| A．if | B．after | C．until | D．when |
The boy became fatter and fatter each day and ＿＿＿made his parents sad.
| A．which | B．what | C．he | D．it |
I＿＿＿＿＿＿＿＿you 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 |
—— Where ＿＿＿＿＿＿＿＿?
—— I got stuck in the heavy traffic, or I＿＿＿＿＿here earlier.
| A．did you go； had arrived | B．are you； would come |
| C．were you; would come | D．have you been； would have been |
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 |