The sign says “Passengers ____ show their tickets and passports.”
A. must B. may C. can D .should
I don’t mind _____back home. I feel like some fresh air.
A. walk B. walking C. to walk D. to walking
I wonder whether buying an electric car ____ a good idea.
A. be B. am C. is D. are
_____ earthquake recorded in the 20th century occurred in Chile in 1960.
A. Large B. Larger C. Largest D. The largest
Any way to improve this ‘welcome letter’ – I want to make sure it sounds ____.
A. friendly B. carefully C. gently D. politely
We use an online bill-paying service, and we almost everything ____ credit card.
A. on B. by C. for D. at
