Unit5 Virtual Reality
5. they were surprised that a child should work out the problem _____ they themselves couldn’t. a. while b. and c. or d. when6. the manager of this company is very busy _____ he spared us two hours. a. and b. so c. or d. but7. pay great attention to me _____ you’ll fail in the experiment. a. or b. because c. and d. but8. though it rained heavily _____ we went on walking. a. but b. so c. and d. yet9. don’t be afraid of asking for help _____ it is needed. a. unless b. since c. although d. when10. he heard a cry for help, ____ he rushed out of the house. a. for b. but c. or d. and11. mr tad must have eaten a lot of food, ____ he is so fat. a. or b. for c. since d. because12. porcelain is not a single clay, _____ a compound of kaolin, ball clay, feldspar, and silica. a. and b. so c. but d. otherwise