The conference was ______ as a great success. (U4-A) A: hacked B: halted C: hailed D: hammered

The army got the order to arrive at the front immediately, but their advance was （）by bad weather. A: confused B: hampered C: hammered D: perplexed

The part of the building below 90th floor ______. A: remained where they were B: cracked down because of the burning C: was hammered down by the falling upper part D: was safe after the attack