Can you ______ your sister from that group of girls?
| A．bring out | B．pick up | C．pick out | D．bring up |
We often think of the days ___we spent together on the island.
| A．when | B．which | C．in which | D．during which |
Air, _ __we breathe every day, is around us all the time.
| A．that | B．/ | C．which | D．it |
The radio set __ _ last week has been out of order.
| A．I bought | B．I bought it | C．which I bought it | D．what I bought |
He is a man of great knowledge, ___much can be learned.
| A．in whom | B．about whom | C．from whom | D．of whom |
Now we can fly to Tokyo. There was a time ________ we had to take a boat.
| A．how | B．what | C．why | D．when |