is no simple answer, ________ is often the case in science.

_____in the queue for half an hour，the old man suddenly realized he had left the cheque in the car.

Lucy _____her daily spending in order to survivethe financial storm

Why didn’t you get the job that paysmore—–Because I like what I____________.

The archaeologists found gold coins and pottery in the lowest level of the site____ they reached three months ago．