The traffic in Shanghai will be blocked and people will come to blows _____ the government plans in advance.
| A．as long as | B．unless | C．even if | D．since |
All but one ______ here just now.
| A．is | B．was | C．have been | D．were |
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 |