We were about to climb up to the top of the mountain ________ it began to rain heavily.
--- I hear Warren _____ in a middle school. --- What? I can’t imagine him _____ as a teacher.
The 18-storeyed building, when _____, will shut out the sun _____ up the rooms in my house.
_____ and out of breath, we reached the top of the mountain and stopped _____ the beautiful scenery.
The performance of the host, _____ to please the audience and draw their attention, was greeted with a cold silence, however.
Some of the schools in Shanghai have moved one step closer to _____ with the global education community.