Choose the best answer to complete the following sentences.Look at that sign! You ___ walk on the grass.
A.couldn't
B.can't
C.aren't able to
D.weren't able to

Choose the best answer to complete the following sentences.In the past pigeons _______ to carry messages.
A.were able to use
B.could be used
C.were able to be used
D.could use

Choose the best answer to complete the following sentences.Can you read this for me? I ________ see without my glasses.
A.can't
B.could
C.am not able to
D.can

Choose the best answer to complete the following sentences.If you told him your problem, he might ___ help you.
A.was able to
B.could
C.be able to
D.can

Choose the best answer to complete the following sentences.________, I always feel safe with you.
A.However fast you drive
B.However you drive fast
C.Whatever you drive fast
D.Whatever fast you drive

Choose the word which has the underlined part pronounced differently from the rest.
A.puddle
B.doubtful
C.soldier
D.dumb

Choose the word which has the underlined part pronounced differently from the rest.
A.initiate
B.nurture
C.natural
D.century

Choose the word which has the underlined part pronounced differently from the rest.
A.gizzard
B.ginger
C.gear
D.geese

Choose the word which has the underlined part pronounced differently from the rest.
A.urge
B.verge
C.gin
D.garbage

Choose the best answer to complete the following sentences.My grandfather ______ walk without any help last night.
A.could
B.is able to
C.was able to
D.can