2 . The hikers made up their mind to reach the peak, ________ the weather was unfavorable, as they believed the view was breathtaking on the top.

A．as if

B．in case

C．even if

D．so that

3 . ______ there is a specific date for World Mental Health Day, it is often celebrated over the course of a week.

A．When

B．As

C．Since

D．While

4 . As a policeman, Robert Moody saw ______ there was violence, drugs were always behind it.

A．unless

B．where

C．as

D．whether

5 . As usual, I went to work on foot that day _______ it was raining heavily.

A．so that

B．as though

C．in case

D．even though

6 . A recent study shows that the post-00s generation has an average bedtime of 00:33 a. m. __________ the pre-1970s has an average bedtime of 23:02p. m.

A．when

B．as

C．while

D．since

7 . It is crucial to opt for healthier foods to maintain good health and prevent lifestyle-related diseases,______ fast food is tempting due to its convenience and taste.

A．now that

B．even if

C．as long as

D．no matter how

9 . It’s getting dark, ________ they’re still working.

A．and

B．but

C．so

D．or