Studies show that sunshine, fresh air, and plenty of rest often _______ a person’s recovery from sickness.
The hospital is ______ signs telling patients that it can offer only limited services.
You really need to go out and get some fresh air and sunshine. You ______ overworked during the last two weeks.
—How long do you think it will be ________ we win the football World Cup? —Perhaps twenty years.
Silk from China found its way to India, the Middle East and Rome, _______ spices and glass, which was not known to China.
Li Yang, the founder of Crazy English, says that he copies it down _______ he comes to a sentence.