Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food produced in the normal companies is ________ better．

A．strictly

B．absolutely

C．relatively

D．exactly

Problems relating to people's livelihood have been the focus of the government, especially ________ Premier Wen Jiabao included them in his government work report last year．

A．when

B．if

C．until

D．since

I'm so glad to see you back, Lucy．How long ________ at your grandma's?

A．had you stayed

B．did you stay

C．have you stayed

D．would you stay

In Disneyland, every year, some 800,000 plants are replaced because Disney refused to ________ signs asking his “guests” not to step on them．

A．send up

B．set up

C．put up

D．take up

Eventually, she was put in ________ charge of ________ whole investigation into the traffic accident．

A．the; a

B．不填; a

C．不填; the

D．the; the