His writing is so confusing that it's difficult to make out ________ he is trying to express.
A．what is it B．what is it that
C．what is that D．what it is that
I couldn't imagine ________ difficult it was for these badly injured victims to make it to the hospital.
A．when B．how
C．what D．where
After a day's exhausting climb we arrived at ________ we had been told was Garden in the Air.
A．what B．which
C．that D．where
The mother, who is strict with her two daughters, has a clear list of ________ they are not permitted to do.
A．why B．how
C．what D．which
Rosa regretted giving her opinion about the decision directly, feeling ________ she should have expressed it differently.
A．how B．why
C．that D．if
You must notice ________ the emergency exit is when you enter the building.
A．which B．where
C．what D．in which
