The two girls are so alike that strangers find __________ difficult to tell one from the other.
| A．it |
| B．them |
| C．her |
| D．that |
.--How much did you ________for the pen? --Five yuan.
| A．cost | B．take | C．pay | D．buy |
Could you _______ me your bike? Mine is broken. --Sure. It's there.
| A．borrow | B．lend | C．giving | D．return |
-- The problem is too difficult, can you show me ______ , WangLe? -- Sure.
| A．what to work it out | B．what to work out it |
| C．how to work it out | D．how to work out it |
I ________a very interesting programme on the radio this morning.
| A．listened | B．heard | C．saw | D．watched |
Our knowledge of computers ________ growing all the time.
| A．be | B．is | C．are | D．were |