An extra ______ tax will be put on American exports.

A．Europe has already imposed tariffs on America.
B．America and Europe have fought with each other because of the trade dispute.
C．The WTO is inactive toward the dispute.
D．The Congress and the Senate will not change the law.

A．The flight was canceled.
B．The airline was forced to return to Amsterdam halfway to the US.
C．An explosion occurred in the plane.
D．An air crash with the American airplane.