It is not socially ________ for parents to leave children unattended at that age．

accessible

adorable

adaptable

acceptable

－Ouch!You hurt me!

－I am sorry．But I ________ any harm．I ________ to drive a rat out．

didn’t mean; tried

don’t mean; am trying

haven’t meant; tried

didn’t mean; was trying

It remains ________ whether Jim’ll be fit enough to play in the finals．

seen

to be seen

seeing

to see

The practice of hanging clothes across the street is a common ________ in many parts of the city．

look

sign

sight

appearance

Leonardo da Vinci(1452-1519)________ birds kept in cages in order to have the pleasure of setting them free．

is said to be buying

is said to have bought

had said to buy

has said to have bought

The crowd cheered wildly at the sight of Liu Xiang, who was reported ________ the world record in the 110-meter hurdle race．

breaking

having broken

to have broken

break

________ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in the city．

Examining

Examined

Having been examining

Being examining

He is rather difficult to make friends with, but the friendship of his, ________, is more true than any other．

once gained

when to gain

as gained

while gaining

These examples, once ________ to his article, will make it more reasonable and acceptable．

add

adding

to add

added

Wei Hua is said ________ a new computer programme recently, but I don’t know when he will finish it．

designing

to design

to have been designing

to have designed