Measures should be taken to__________.A.keep slee

Fuel injection valves should be taken out, cleaned, and lifting checked every _____.

______ difficulties should be taken into account.A．Some theseB．All suchC．These allD．Such a

According to Paragraph 5, it can be concluded that______.A．suicide should be taken as the

It is necessary that measures _____ taken right now.A: beB: must beC: will beD: can be

Care must be taken in using this method lest overflow______.A．should occurB．occursC．occurr

The measures people should take to deal with the drought include______.A．making new econom