In terms of extra staff ─ how many will we need?

　　就額外的員工來說，我們需要多少人？

　　How many people were there at the concert?

　　音樂會上有多少人？

　　How many people does the company employ?

　　這個公司雇用了多少人？

　　How many students have been entered for the exam?

　　有多少學生報名參加考試？

　　How many driving lessons have you had so far?

　　你到目前為止上過多少節(jié)駕駛課了？

　　How many stairs are there up to the second floor?

　　上到第三層一共有多少磴樓梯？