I think her dress comes from the 1970s.—It _______be from that time. The dress looks so modern.

This problem is too difficult. — You can’t work out the math problem unless you ______ to your teacher carefully. [ ]

He________ an English club last year and has improved his English a lot.

What are you doing _____vacation?— I’ m going hiking.[ ]

______ does your cousin usually go to work on foot?—He says it’s good for his health.