____ directly to the sun in summer will do great harm to our skin.
A. Be exposed B. Being exposed C. Exposing D. Exposed
It rained heavily overnight and not until this morning____.
A. did it stop B. had it stopped C. stopped D. it stopped
--Do you know what caused the accident? --- No, not yet. The matter _____.
A. is being looked into B. was being looked into C. looked into D. is looked into
A new museum is being built in our city and it’ll be accessible to the citizens when___ next year.
A. completing B. is completed C. to be completed D. completed
Robert failed to complete his education____ he found it hard to focus on his studies.
A. although B. if C. because D. while
We live in a society_____ there is a great deal of debate about competition.
A. which B. where C. when D. that
