Modern（）perhapscausesmoreproblemsthanitsolves.
A、technique
B、technology
C、tactics
D、tendency
GreatasNewtonwas,manyofhisideas____todayandarebeingmodifiedbytheworkofscientistsofourtime.
A、aretochallenge
B、maybechallenged
C、havebeenchallenged
D、arechallenging
IsTomatschooltoday?No,He’sathome______hehasabadcold.
A、because
B、if
C、until
D、before
患者男，40岁，2周来右侧咬物不适，冷水引起疼痛，近2日来夜间疼痛，影响睡眠，并引起半侧头痛，疼痛不能定位，检查右侧上、下磨牙面均有深的龋洞。对患牙的应急处理为
A、拔除
B、开髓引流
C、抗炎止痛
D、安抚治疗
E、间接盖髓充填
Thecaris_____expensive_____hecan’tbuyit.
A、too,to
B、so,that
C、such,that
D、enough,that