—Some English idioms are difficult to understand.

—Exactly, ________ you know the meaning of each word.

—Some English idioms are difficult to understand.

—Exactly, ________ you know the meaning of each word.

A. if only                  B. even if                  C. as if                       D. now that

—Some English idioms are difficult to understand.

—Exactly,          you know the meaning of each word.

A．if only          B．even if          C．as if         D．now that

—Some English idioms are difficult to understand.

—Exactly, ________ you know the meaning of each word.

A．if only                 B．even if                   C．as if                 D．now that

—Some English idioms are difficult to understand.
—Exactly, ________ you know the meaning of each word.