．Sheep on a remote Scottish island are gradually shrinking _______ global warming, according to a study published in the journal Science.
| A．on account of | B．by means of | C．in case of | D．in spite of |
It is the first time that I _______ this kind of moon cake.
| A．enjoyed | B．have enjoyed | C．enjoy | D．enjoying |
There was ______ time _____ Chinese used foreign oil.
| A．a; when | B．a; while | C．/; when | D．/; while |
While ___ along the street, I met an old friend of mine.
| A．I walking | B．was walking | C．I am walking | D．walking |
Your time should be made full use of ________ English well.
| A．learning | B．to learn | C．learn | D．to learning |
Actions __________ walking and drinking are quite difficult in the moon.
| A．for example | B．such as | C．including | D．liking |