The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can __ _ all foods are secure to us, but we are sure that the situation is turning for the better.
Thank you for all your hard work last week. I don’t think we ______ it without you.
John, look at the time. ___________ you play the piano at such a late hour?
—May I smoke here ? —If you ____, choose a seat in the smoking section.
This cake is very sweet. You _____ a lot of sugar in it.
— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear ! She ______ a lot of difficulties !