Mike，let's prepare for our baseball game．
OK．We'll lose the game ______ we try our best．（ ）
| A． |
unless |
B． |
once |
C． |
after |
D． |
since |
Huangguoshu Waterfall is beautiful that I want to come here again next year．（ ）
| A． |
so |
B． |
too |
C． |
such |
We all know that one of the world's most popular sports football．（ ）
| A． |
am |
B． |
is |
C． |
are |
"Cindy，how far is it from your home to school？""About 20 walk．"（ ）
| A． |
minutes |
B． |
minute's |
C． |
minutes' |
We should not trees in order to make our environment more beautiful．（ ）
| A． |
write down |
B． |
cut down |
C． |
turn down |
Xiao Ming，you'll be late for school______you hurry up．（ ）
| A． |
after |
B． |
though |
C． |
unless |