人们常常在达不到目标之时，说自己本来就没有想达到这个目标，这是一种（）。
A. 酸葡萄心理
B. 甜柠檬心理
C. 援例心理
D. 诡辩心理
His _________________of that singer is perfect.
A. imitate
B. imitated
C. imitates
D. imitation
He was __________ doing the same thing every day.
A. tired of
B. tired with
C. tired on
D. tired in
George ______________________ the trend and opened his first shop online.
A. catch on to
B. caught on to
C. catch up to
D. caught up to
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