He doesn't (say) in his letter (that) he' s going to (be back) (or not).
A. say
B. that
C. be back
D. or not
学校进行教育教学活动的基本单位是( )
A. 年级
B. 班集体
C. 小组
D. 个体
The (first) Olympic (Games) (in) modern (time) took place in 1896.
A. first
B. Games
C. in
D. time
He went to the library (and) spent the whole afternoon there (to look) for (material) for an article (on) Shakespeare.
A. and
B. to look
C. material
D. on