They asked me so many ______ questions that I got ______．

A．confusing; confusing                              B．confused; confusing

C．confused; confused                             D．confusing; confused

Once ______ , the plan can’t be changed．

A．begin          B．beginning         C．began           D．begun

He observed a stranger _______ around the store at 12 p．m．last night．

A．to hang        B．hang          C．hanging           D．to be hanging

Carl Linnaeus made great contributions to ________ plant species．

A．group          B．have grouped            C．grouping           D．been grouping

Joan had often heard ____ said that Marley had no money．

A．one           B．it               C．once         D．her

_________ doesn’t seem to have been any difficulty solving the problem．

A．There         B．It       C．He         D．That

_______ is it _____ has made Peter _______ he is today?

A．What; that; that                                         B．What; that; what

C．What ;what; that                                             D．That; that; what

_______ fun it is to jump into a pool or go swimming in summer!

A．What      B．How         C．What a       D．How a

It was ______ he said ______ disappointed me．

A．that; what         B．that; that          C．what; that          D．what; that

---How did you find your visit to the ancient tomb?

---- _________________．

A．Without other’s help．                            B．Oh, magnificent

C．On our own．                                   D．By taking the subway．