The little boy _____on the mat ____ to his parents that blackbirds had _____their eggs on Mars．

A．lay; lying; lied                          B．lied; lied; lied

C．laid; laid; laid                           D．lying; lied; laid

—What did your parents think about your decision?

—They always let me do _____ I think I should.

A．when            B．that              C．how              D．what

He made up his mind to devote his life _____ pollution ______happily．

A．to prevent; to live                       B．to prevent; from living

C．to preventing; to live                     D．to preventing; from living

With a lot of problems _______, the principal decided to hold a meeting to have a discussion about them

A．to solve           B．being solved       C．solving            D．solved

You can’t imagine this lake used to be a beautiful place in our province       .

A．at any time        B．at one time        C．in no time         D．at times

The new bridge is ______ the one built last year.

A．three times width of                     B．three times that of

C．three times the width                    D．three times the width of

      we’ll have our sports meet this week       the weather.

A．If; depend on                          B．Whether; depend on

C．If; depends on                          D．Whether; depends on

He tried his best to solve the problem, ________ difficult it was.

A．however          B．no matter         C．whatever          D．although