If the writer continues to develop this passage, he will probably ______.
A. illustrate some experiments with old people
B. introduce more information about the infants
C. devote some space to the background information about the experiment
D. talk about different theories on learning
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The statement "As they smiled and gurgled at the moving mobile" (line 7, para. 2) suggests that ______.
A. the infants liked the beautiful color of the mobile although they couldn't say so
B. the infant were happy because the cribs were very comfortable to sleep in
C. the infants realized the connection between the motion of one leg and the bobbing of the mobile
D. the infants wanted to grasp the bobbing mobiles and keep them
Mary ______ at the bus stop for about an hour when Tom finally came and started to argue about what ______ before.
A. waited, happened
B. have waited, has happened
C. had waited, was happened
D. had been waiting, had happened
The "current games" (line 1, para. 3) refers to ______.
A. new games to be played for the first time
B. old games no longer played
C. the most popular games at the time
D. games played at the time
Attending continuing education classes ______.
A. does not cost much more
B. is expensive
C. requires a loan
D. is free of charge
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