He did such a ________ job that everyone in the office was satisfied （满意).
A. mistake
B. perfect
C. dry
D. decide
－－－ What a day! It is quite hot today.－－－－ ________.
A. So it is
B. So is it
C. So it does
D. So does it
Stephen took the view that his headache was caused by ____________.
A. major
B. pick
C. stress
D. environment
核心家庭是指（)。
A. 一对夫妻及其未婚子女组成的家庭
B. 两代以上亲子关系的家庭成员共同居住而形成的家庭
C. 两对或两对以上一代夫妇没有未婚子女的家庭
D. 两对或两对以上同代夫妇及其未婚子女组成的家庭
E. 同居家庭
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