—What’s the matter with you? You look so worried.
-- I don’t know ___________ the problem.
| A．what to solve | B．how to solve | C．to solve what | D．how can I |
Some children can’t afford ________ clothes.
| A．buy | B．buying | C．to buy | D．be bought |
My parents ask me to ________ my brother when they are out.
| A．bring up | B．think of | C．agree with | D．look after |
What about _______ me some money?
| A．lend | B．to lend | C．lending | D．being lend |
Wendy likes travelling. She ________ stays at home during holidays.
| A．seldom | B．usually | C．always | D．often |
__________ the girls _________ over twenty in our class.
| A．A number of; are | B．The number of; are | C．A number of; is | D．The number of; is |