Either you or I _____ going to attend the meeting in the afternoon.
It is really hot ______ January in Xi’an now. Better take off your coat.
___________, a form must be filled in.
If you can make what the teachers teach ______, you will make rapid progress.
I spent the whole day repairing the motorbike. The work was _____easy.
Whoever invented______ wheel is believed to have made______ most useful invention in______ history.