Although we met with some difficulties in building the railway, we were still _____ about finishing it before the deadline.

It is known that ________ medical examination helps people to find out health problems as early as possible.

__________ of furniture have been tested to guarantee good quality.

(2013·高考福建卷)The Forbidden City attracts a ________ stream of visitors every day，especially during national holidays.

I think whoever makes______contributions to the company than the others should get ______income.