.
Hardly_______when the fans began to scream with excitement.
| A．the star showed up | B．did the star show up |
| C．had the star showed up | D．the star had showed up |
You can use a large plastic bottle, _____ cut off, as a pot to grow young plants in．
| A．the top is | B．the top of which |
| C．whose top | D．with its top |
Although at present human egg cells and embryos needed for cloning research are difficult _____, Newspapers _________ evil leaders hoping to clone themselves．
| A．to obtain; wrote | B．to obtaining; wrote to |
| C．to obtain; wrote of | D．to be obtained; wrote |
Quzhou is ______ most comfortable city, where you can visit a great many interesting places, such as______ mysterious Longyou Grottoes．
| A．a; the | B．a; 不填 | C．the; a | D．不填; the |
I have already forgotten ______ you bought the computer.
| A．that it was when | B．that it was what |
| C．what it was that | D．when it was that |
With five professional hands ______ them next month, these students are sure to complete the experiment on time.
| A．helping | B．help |
| C．to helping | D．to help |