Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life.
The science of computer, rapid progress has been made in recent years,plays a very important role in our daily life.
Since you have such good preparations, there ______ be any problem about passing the coming job interview.
— How long do you suppose it is ______ he arrived here? — No more than half a week.
— Could you meet me at the airport? — I'd like to,but I'm afraid I ______ a very important meeting when you return.
Experts warn that global warming will cause extreme climate changes including more______ floods, heat waves and droughts.