37. Alan had taken care with his appearance that evening.

Exactly______ the potato was introduced into Europe is uncertain, but it was probably around 1565

Does Li Hua serve in the army?—No, but he________ in the army for three years

What do you think of the young boy —He is good ___________ me. He is good ________ English, and he often tells melistening to English songs is good __________ learning it well.

Never before ________ to ________ what his parents expect of him more than it is today. [ ]