Great efforts to increase grain production if food shortages are to be avoided.
| A．could be made | B．must be made |
| C．might be made | D．would be made |
Gun control is a subject Americans have argued for a long time.
| A．of which | B．with which | C．about which | D．into which |
She brought with her three friends, none ofI had ever met before.
| A．them | B．who |
| C．whom | D．these |
Whenever I met her, _________ was fairly often, she greeted me with a sweet smile.
| A．who | B．which | C．when | D．that |
My friend showed me round the town, was very kind of him.
| A．which | B．that | C．where | D．it |
They’ve won their last three matches. ________I find a bit surprising
| A．that | B．when |
| C．what | D．which |