一、选择填空（共15小题；每小题1分，满分15分）单项填空，从A、B、C、D四个选择中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑．
1．From _____ space，you can see 71% of the earth is water．It looks like ____ blue ball．（ ）
A．/，a B．the，a C．a，a D．/，the
2．School starts again ____ spring，______ the end of February．（ ）
A．from，at B．in，at C．from，in D．in，from
3．In China，the number of ______ in primary schools is bigger than that of senior high school．（ ）
A．female teachers B．females teachers
C．female's teachers D．female teacher
