You've the computer for ten years and it doesn't work well.Why don't you buy a new one？（ ）
A．boughtB．hadC．haveD．borrowed
The teacher encourages the children to feel _________ about asking questions when they don't understand．（ ）
A．nervousB．confidentC．excitedD．practical
I will see what I can do，but I can't ______ you anything．（ ）
A．planB．prepareC．promiseD．protect
Anita spoke _________ quietly that I could hardly hear her．（ ）
A．tooB．suchC．soD．very
When you are home，give me a call to let me know you __________ safely．（ ）
A．arrivedB．have arrived
C．will arriveD．are arriving
My cousin works for an airline．He flies planes．He is __________．（ ）
A．an inventorB．a scientist
C．an explorerD．a pilot