_________with the size of the whole earth,the highest mountain does not seem high at all.
--- I hear Jane has gone to the Holy Island for her holiday. --- Oh, how nice! Do you know when she ______ ?
The factory was built in a secret place, around _____ were high mountains.
The teachers were discussing the research project that they would like to see _____ in the coming holiday.
--- It’s the office! So you ______ know smoking is not allowed here. --- Oh, sorry.
On the day I was to take the driving test, so ______ was I that I could not understand what I was