1 . Other tools that are ______ helpful are structured brainstorming, mind mapping and making forced ______.

A．peculiarly, contracts

B．particularly, connections

C．primarily, contacts

D．specially, contradictions

2 . In an economy depression, it ______ severely for two or more years.

A．expands

B．extends

C．contracts

D．stretches

3 . While fighting for our benefits, we must bring our ideas into________ with the laws of nature.

A．correspondence	B．conflict
C．contract	D．relations

4 . The iron I have newly bought on the cross-border online shopping site is ________ for a year against faulty workmanship.

A．contracted

B．launched

C．purchased

D．guaranteed

5 . Smoking is _______ as a leading cause of lung cancer.

A．applied

B．packed

C．recognized

D．contracted

6 . We shouldn’t just __________things without getting all the facts.

A．contract

B．slam

C．assume

D．motion

7 . There is no doubt __________the temperature goes down, metal ____________.

A．that...contacts

B．whether...contrasts

C．that when...contracts

D．when...contracts