I don't think about my old friend s very much, only ________．

A．now and then

B．by and by

C．step by step

D．more or le s s

The twin s were so much alike that it wa s impo s sible to ________ one from the other．

A．di stingui sh

B．separate

C．identify

D．recognize

Thi s i s an illne s s that may re sult in total blindne s s if ________．

A．left being untreated

B．left untreated

C．leaving not treating

D．leaving not having treated

The children have been playing with my hat－they’ve knocked it out of ________．

A．shape

B．date

C．order

D．balance

“Who will ________ the re spon sibility? ” the manager a sked angrily．

A．bear

B．stand

C．tolerate

D．ignore

The bigge st surpri se for him wa s ________ he wa s elected captain of the football team．

A．where

B．in which

C．when

D．what

Mi s s Jone s ________ mu sic at Bardon School for five year s and now she i s an actre s s．

A．taught

B．ha s taught

C．had taught

D．ha s been teaching

________ several time s, but unfortunately, the boy still couldn't smooth away the problem on hi s own．

A．Having been explained

B．The problem having been explained

C．The problem had been explained

D．Although the problem had been explained

Mr．smith ha s little acquaintance ________ drama, while he ha s a wide knowledge ________ painting．

A．with; of

B．of; about

C．with; about

D．of; of

The film Harry Potter wa s quite ________ hit acro s s the world, bringing in ________ income of box office of over million s of dollar s within five month s．

A．/; an

B．a;/

C．a; an

D．a; the