35．—Why didn't you ask him for help?
—______, but he was working on his computer．
| A．I had wanted | B．I had wanted to |
| C．It's hard to say | D．Don't mention it |
The police ______ for the lost child everywhere.
| A．is looking | B．has looked | C．are looking | D．are looked |
Both bread and butter ______ on sale in this shop.
| A．is | B．are | C．have | D．has |
The problem is _____ we can master modern science and technology in a short time.
| A．if | B．that | C．what | D．how |
Give it to _____ you think can do the work well.
| A．who | B．whoever | C．whom | D．someone |
Included _____.
| A．all kinds of books | B．was all kinds of books |
| C．were all kinds of books | D．all kinds of books are |