1. There are other problems which I don‘t propose to ________ at the moment.

A) go into B) go around C) go for D) go up

2. It is quite necessary for a qualified teacher to have good manners and ________ knowledge.

A) extensive B) expansive C) intensive D) expensive

3. I felt somewhat disappointed and was about to leave， ________ something occurred which attracted my attention.

A) unless B) until C) when D) while

4. A love marriage， however， does not necessarily ________ much sharing of interests and responsibilities.

A) take over B) result in C) hold on D) keep to

5. The ability to store knowledge makes computers different form every other machine ________ invented.

A) ever B) thus C) yet D) as

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