---______ bad weather yesterday!

---Yes. It caused a few traffic accidents.

______ dangerous it is to ride fast on a busy road!

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

________ modest and confident person he is!

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

1 

_______have you been to Tianjin?---Twice.

A.How many   B. How many times C. How  D.  How many time

We don’t know __________ he can make a plane by himself. It is amazing.

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