Only lately about the dark secrets behind the seemingly-happy marriage of the golf star Tiger Woods.
A．the public have known B．were the public known
C．have the public known D．the public knew
Chemical pollution will bring about a threat to agriculture and food chain, and ________ to human health.
A．frequently B．significantly C．steadily D．consequently
Comparison may make something appear more beautiful than it is when ______ alone.
A．to see B．seeing C．is seen D．seen
Jessica has always been honest and straightforward, and it doesn’t matter ______ that she’s talking to.
A．who is it B．who it is C．it is who D．it is whom
——John always thinks of others instead of himself.
—— So he does. It is _______ of him to want to help others.
A．aggressive B．conventional C．evident D．typical
Scientific researches show that to _________ a language one had better often get exposed to it.
A．acknowledge B．access C．acquire D．assess
