The purse found on the playground matches the ____ by Mary, so it must be hers.
| A．direction | B．expression | C．description | D．instruction |
Tom’s mother kept telling him that he should work harder, but ＿＿＿didn’t help.
| A．he | B．which | C．she | D．it |
In fact, ＿＿＿is a hard job for the police to keep order in an important football match.
| A．this | B．that | C．there | D．it |
Someone is ringing the doorbell. Go and see ＿＿＿＿＿＿.
| A．who is he | B．who he is | C．who is it | D．who it is |
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 |