Months ago we sailed ten thousand miles across the open sea, which_____ the Pacific,and we met no storm.
______, I have to put it away and focus my attention on study this week.
As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.
Staying in a hotel in Shanghai one day costs ______ renting a house in my hometown for a week.
I am really worried about his grades in the coming test because of the little use he ______ of his time.
I didn’t go outing on National Day because the bad weather ______ the difficulty.