I like swimming,while what my brother enjoys ______.
| A.cooking | B.to cook | C.is cooking | D.cook | 
(安徽卷26).Bob would have helped us yesterday ,but he.
| A.was busy | B.is busy | C.had been busy | D.will be busy | 
(全国II 19). Excuse me. II was blocking you
r way.
| A.didn’t realize | B.don’t realize | C.haven’t realized | D.wasn’t realizing | 
(全国II 15). Linda ,make sure the tables ____ before the guests arrive.
| A.be set | B.set | C.are set | D.are setting | 
(全国I 32).The discovery of gold in Australia led thousands to believe that a fortune _______.
| A.is made | B.would make | C.was to be made | D.had made | 
. ( 全国I 28). When you are home, give a call to let me know you _________safely.
| A.are arriving | B.have arrived | C.had arrived | D.will arrive |