_____in the ticket hall for almost an hour, I suddenly realized I had left my ID card home.[ ]

Rarely ______ so heavily in Ning Xia as it did in Hei Long Jiang last year.

y, according to someexperts, ______ to attract more high-end talents to contribute to Shanghai’sdevelopment

Is that_____ pen — Yes, it is.

You should try your best ____ your English.