—What do you think of the 3D-printed ______?
—I’m afraid they are not safe enough to live in.
| A．tools | B．buildings | C．cars | D．toys |
—______ have you lived in Binzhou?
—For about ten years.
| A．How soon | B．How often | C．How long | D．How much |
—What are you looking for?
—I'm looking for the ring ______my husband bought me last year.
| A．that | B．who | C．whom | D．it |
My pen pal Andrew found it difficult ______ Chinese well
| A．learning | B．learn | C．to learn | D．learned |
—My English teacher visited Australia last summer.
—Which city did he visit?
—
| A．Paris. | B．Washington. | C．London. | D．Sydney. |
She can hardly write her own name, ______?
| A．can she | B．can't she | C．need she | D．needn't she |