Dad____________TV when it began to rain yesterday．（ ）
A．watchesB．watched
C．is watchingD．was watching
Two tickets for Sunday， please!
Sorry． There is ____left．（ ）
A．nothingB．noneC．someD．anything
Time waits for no man． But some people won't realize the importance of time______it's gone．（ ）
A．asB．sinceC．whenD．until
Li Hua is a volunteer．She will put up a sign to remind people to save every drop of water．Which of the following signs should she choose？（ ）
A．
B．
C．
D．
I's easy to clean up all the trash if we each offer to help．
Yes． ． （ ）
A．Many hands make light work
B．There is no smoke without fire
C．Where there is a will，there is a way
D．A true friend reaches for your hand and touches your heart
The environment is terrible．
I think it will be even worse the government takes actions to protect it． （ ）
A．untilB．whenC．ifD．unless