--- Mary doesn’t remember when and where she this skirt.
| A．buy | B．have bought |
| C．will buy | D．bought |
It’s crucial that I study for it because it _____ 30％0f the final exam．
A．makes up of B．makes up C．is made up
If I______you，I’d work hard and make great progress in learning．
A．am B．were C．was
She writes slowly so she has trouble ______notes in class．
A．taken B．taking C．to take
All the children like the teachers_______ can understand them.
A．What B．Which C．Who
一David is outgoing．
— _____Both of them are popular at school．
A．So is Tom． B．So he is． C．Neither does Tom．