单项选择题
On（）Shanghai they went to see the director at once.
A.comingB.gettingC.reachingD.arriving
单项选择题 When payments are made every week the usual word is（）.
多项选择题 职业人群健康监护分为（）、离岗后医学随访检查以及应急健康检查等5类。
单项选择题 You had better have more（）of catching the train if you got a bus to the station instead of walking.
