How can they learn anything useful ______ they spend all their spare time playin

题型：不详难度：来源：

How can they learn anything useful ______ they spend all their spare time playing online games?

A．while

B．unless

C．although

D．when

答案

解析

略

举一反三

Earth is a rocky planet _______ liquid water, which is necessary for life, can exist.

A．as

B．which

C．where

D．when

题型：不详难度：| 查看答案

. Such women _____ know Tom thought he was charming.

A．that

B．which

C．/

D．as

题型：不详难度：| 查看答案

I get into the habit of surfing the Internet___I can find a lot of useful information.

A．which

B．that

C．when

D．where

题型：不详难度：| 查看答案

There are many people _______ behave so well all time _______they are respected
by everyone around.

A．that; who

B．who; that

C．who; which

D．that; when

题型：不详难度：| 查看答案

. ____________ the dinosaurs disappea

red still remains a mystery.

A．whether

B．that

C．if

D．Why

题型：不详难度：| 查看答案