Mary shut the window just now ______ she could keep the insects out.
A．so thatB．whenC．tillD．after
As one of the most exciting sports，volleyball ______ in the Olympic Games in 1964．（ ）
A．includedB．is included
C．was included
Du Fuguo is a hero ______ is known to millions of Chinese people．（ ）
A．whoB．whichC．what
﹣﹣﹣Look!My mother ______ a new dress for me．
﹣﹣﹣Wow，it looks very nice on you．（ ）
A．is makingB．has madeC．will make
______ it's a public holiday today，some firefighters in our city are still on duty．（ ）
A．AlthoughB．OnceC．If
﹣﹣﹣You are singing to the plants!
﹣﹣﹣That's true．I believe it helps them grow ______．（ ）
A．slowerB．betterC．harder