This year’s National Day ____ in a practical way, which is reported in People’s Daily.   
#103596
A
is to be observed
B
observe
C
observes
D
is to observe
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I am so tired,for I ________ English for 2 hours.
#99761
A
is studying 
B
have been studying
C
was studying 
D
had been studying
--- Look!Somebody ___ the sofa.--- Well,it wasn’t me. I didn’t do it.
#100376
A
is cleaning
B
was cleaning
C
has cleaned
D
had cleaned
She gave me half, and  _____  the other half for her husband
#100337
A
kept
B
had kept
C
keeps
D
will keep