–We’ll go to the supermarket if it .
– Really? The thing is, who knows when it ?
| A．doesn’t rain, will stop raining |
| B．is rain, stops raining |
| C．don’t rainy, won’t rain |
| D．won’t rain, stops to rain |
Trees can stop the sand _____ towards the rich farmland in the south.
| A．moved | B．to move |
| C．from moving | D．moves |
【改编】Not only his parents but also he very friendly to me.
| A．are | B．is | C．be | D．am |
—We’ll make a trip to Hainan Island next weekend. Will you go with us?
—No, I can’t _____ it at present because I have little money.
| A．afford | B．save | C．offer | D．accept |
Science is _____ difficult for some students ____ learn, so many of them don’t like it.
| A．enough, to | B．too, to |
| C．so, to | D．much , to |
【原创】There are so many kinds of pens in the shop ,I can’t decide ＿＿.
| A．when to buy |
| B．where to buy |
| C．what to buy |
| D．which to buy |