This exercise makes me confused, please help:
Identify the one word or phrase A,B,C or D that should be corrected or rewritten:
1> Not until (recently) has (interest of) (tidal electric power) plants been (revived).
2>(Whether satelites) orbiting the earth (take) photoghaphs of (cloud conditions) which (are relayed) to meteorologists.
3> There (a few) drugs (are) (today) that (are valued) more than penicillin.
Here is my guess:
1> A
2> A
3> B
If they're wrong, please help me correct them. If they're right, please explain.
Kind regards,
Khai Minh