单项选择题
It is reported that there is no better （）for mother’s milk.
A.alternative B.exchange C.equivalent D.substitute
单项选择题 Theclassneedsamonitor（）.
单项选择题 Oneshouldneverloseheartwhen（）withtemporarydifficulties.
单项选择题 Threenewbuildings（）onthecampusbytheendofthisyear.
